We got married in 1997, we had 240 guests plus about 25 kids so probably a tad bigger than you're planning. We hired a marquee, tables and chairs @ £1.2K almost 1/4 of our 4K budget. We also hired china plates which including washing up was about £60, 6 students @ £50 each to help with food, car parking, and to run the bar.
Prior to the event, I bought/acquired some fridges and freezers and made all the buffet food in advance. As it was July we did a pick your own strawberries session the day before and I made some gateuax and apple pies (froze these well in advance) , but was basically salads, cold meats, sandwiches, cocktail sausages, sausage rolls, etc etc.
A friend's brother ran a pub so he supplied a keg of beer and one of lager (wouldn't bother with the lager these days as is well out of favour). We also did a big vat of Pimms (which I adore), and a non alcoholic fruit punch. My work colleagues bought be a food processor as a wedding pressie which was VERY handy for the salads and fruits.
We borrowed the church tea urns cups and saucers, and had set up for tea and coffee serve yourselves.
Flowers were a terracotta plant pot with a church candle stuck in oasis and a few flowers round the side. Our table had a few extra flower baskets to decorate - we gave these away to various helpers.
We hired a bouncy castle for the kids and did a treasure hunt for them and someone brought a mini tractor and trailer and did rides.
One of DH's customers ran a coach company and supplied a coach to take guests to and from the church (as a present). Photographer was friend of a friend. But you could do little cards with login details and passwords, upload a few preparation photos as there is a reason to login and ask folk to upload their photos to a Photobucket or similar site. You'll get everyone being nosey, logging in to see and and uploading off their mobiles as it happens.
We had old vehicles (ours and people we knew) to take us to church. I made my dress £75. DH bought a nice suit £400 - 10% of budget but he still fits it now so had plenty of value from it. Rings were made to measure from local jewellers VERY competitively priced compared to High Street - worth checking this out as the big chains have a monopoly.